Steam-boiler



(No Model.) I 5"Sh eets-Sheet 1.

N. S. & E. R. BOWDISH.

STEAM BOILER. No. 416,558. I 49* Patented Dec. 3, 1889.

(No Model.) 5 SheetsSheet 2. N. .85 E. R. BOWDISH.

STEAM BOILER. N0.416,1558. Patented Dec. 3, 1889..

(No Model.)

5 Sheets-Sheet 3. N. S. &-E. R. BOWDISH.

STEAM BOILER.

Patented Dec. 3, 1889.

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(No Mbdel.) 5 Sheets-Sheet 4;

N. S. 8: E. R. BOWDISH.

. STEAM BOILER.

No. 416,558. Patented Dec. 3, 1889.

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N. PETERS. Phutwllllw'gfiphur, Wuhingtou, n, c.

UNITED STATES PATENT OFFICE.-

NELSON S. BOVVDISH AND EDWARD R. BOVVDISIT, OF SKANEATELES, NEWV YORK.

STEAMBOILER.

SPECIFICATION forming part of Letters Patent No. 416,558, dated December3, 1889. Application filed February 28, 1889. Serial No. 301,564. (Nomodel.)

To all whom it may concern;

Be it known that we, NELSON S. BOWDISH and EDWARD R. BowDIsH, citizensof the United States, residing at Skaneateles, in the county ofOnondaga, State of New York, have invented certain new and usefulImprovements in Steam-Boilers, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention has relation to that class of steam-boilers known aswater-tube, and is especially adapted for marine purposes, though it maybe employed otherwise and still preserve the advantages herein attained.

The objects and advantages of the invention, together with its novelfeatures, will hereinafter appear, and be particularly pointed out inthe claims.

Referring to the drawings, Figure 1 is a front elevation of the boiler,the shell being removed and certain portions broken away to expose theinternal arrangement. Fig. 2 is a side elevation similar to Fig. 1. Fig.3 is a similar view in rear elevation, and Fig. 4 is a front elevationof the complete boiler.

.Figs. 5 and 6 are details in section of the able dampers or covers 5.Any ordinary form of damper may be employed; but in this instance thedamper devised consists of a damper-plate 6, provided with anoutwardly-bent handle 7, the bottom of which is inclined to rest againstand be supported by a slanting flange or shelf 9, the handle beingprovided at its lower end with a series, or it may be a single, notch 8,designed to take over the edge of the shelf, and thus retain the damperat a suitable distance from the opening for the purpose of affording aproper amount of draft.

10 represents the ash-pit, which is formed by a rectangular casting 11,formed with a lower flange or base 12 for bolting in position,

and with an upper flange 13, upon which rests the grate l4.

To a vertical extension of the frame 11' is bolted or otherwise securedthe lining 16 of the fire-box 17. This lining may be of any suitablemetal or fire-clay, as desired.

At the front of the boiler there is formed, by opposite vertical pipes18 and a transverse connecting-pipe 19, an arch directly over the frontof the fire-box. To one of the pipes 18 is connected a supply-pipe 20,through which feed-water is forced.

21 represents a series of horizontal connected water-tubes, which isarranged in a tier at that side of the boiler opposite to which thefeed-water pipe 20 is located, the tier of pipes or tubes beingconnected with the transverse pipe 19 at the lower end of the former.The upper tube of the series at its rear end is connected with adepending pipe or tube 22, which extends about half-way, where it isconnected with an elbow 23, from which there depends a second tube 24,which enters a transversely-arrangcd mud-drum 25 at about its center,the mud-drum being located in but this we prefer for the numerousadvantages arising therefrom, in that they permit The form of headershown may be supersededby other forms of connections;

of expansion of the tubes and removal of the headers or connections forcleaning the tubes. In this instance screw-plugs close the openings.

For the purpose of economizing space and exposing the greatest amount ofsurfaceto the action of the products of combustion as ICd each tier extending in opposite directions-so that the pipe immediately below anotherwill intervene between it and the fire. The series thus constructed areplaced in as close proximity to each other as practicable.

At the upper ends of each of the vertical feed-water tubes 18 arelocated couplings 32, having upwardly extending flanges 33, to which arebolted vertical binding-rods 34, at

:0 the upper ends of which are formed curved embracing-hooks 35, whichtake over the upper tier of tubes. A binding-rod 36 is arrangedtransversely across the series of wator-tubes and passes throughopenings formed I 5 in the vertical rods 34, and are providedwithbinding-nuts at those ends, thus serving to maintain the tubes in properrelation to each other.

36* and 37 represent, respectively, front and 20 rear hollow waterheaders superimposed above the series of water-tubes 29, the upper tubeof each of said series of tubes terminating in the header 36 Terminatingin each of the headers 36 and 2 5 37 are longitudinal steam and waterseparating chambers 38, the headers being provided with removable plates39 and 49, coincident with the ends of the chambers for the purpose ofcleaning the latter and allowing for 0 the expansion of the tubes.

A water-separating flange 40 extends Vertically from the base of each ofthe headers 36 and 37, and intermediate the chambers 38 and above thesame is mounted a superim- 3 5 posed steam chamber or dome 4], which,like the chambers 38, may also be provided with a plate, as 39, forcleaning purposes, &c.

From the rear header 37 there depends at each side one member 42 of aconnection,

40 which, with a similar member 43, forms a proper connection forvertical water-columns 44, which depend, and by a suitable connection 45at their lower ends, communicate with the mud-drum 25.

At that side of the boiler opposite the feedwater tubes 21 are located alongitudinal vertical series of tubes 46 connected by ordinary returnbends or headers 4-7, or by the arrangement shown at 29 and 30, theupper tube of the series connected with the drysteam chamber, and thelower one of the series being the steam-supply pipe, the whole forming asuperheating-coil for further drying the steam preparatory to beingconducted to the engine.

The operation of our invention is as follows: ater being forced throughthe supply-pipe 20 enters the series of tubes 21 and is primarily heatedby the time it reaches the upper 6c tube of the series, from whence itis conducted by the tube 22 to the mud-drum. The water now rises throughvertical tubes 46, connected with the mudsdrum, to each of thehorizontal tiers of water-tubes 29. It is here subjected to the heatgenerated by the products of combustion rising bet-ween the tubes andpasses into the header 36*, and from thence into the separatingchambers3S. \Ve prefer to employ two separating-chambers where the boiler isused for marine purposes, as the wateig bcing divided, more readilyremains nearer a level and is not so affected by the pitching of thevessel. When the water reaches the header 36, it is divided, so thateach of the chambers accommodates-one-half of the series of water-tubes,the division being caused by the partition or supporting-flange 40. Thesteam generated in the chamber passes up into the dry-steam chamber 41,and from thence to the superheating-coil 46 and to the engine; or, ifdesired, the superheating-coil may be omit-ted and the steam conducteddirectly from the dry-steam chamber or dome to the engine; but we preferthe former. construetion, as the steam is superheated and rendered moreexpansive. The water, after being separated from the steam, passes downthrough their respective columns 44 and into the mud-drum, and thencereturned to the water-tubes, as described, thereby forming a completecirculation. One or more columns 44 may be provided; but we prefer two,as shown, each of the columns being of a capacity in this instance ofthree tubes, in that there are employed in the construction but sixtiers of water-tubing. Over the boiler thus constructed is mounted asuitable shell or jacket, which in this instance we form of two layersor walls of sheet-iron, having an interposed packing ofheat-non-conducting material, the two walls being connected at theircorners by proper spacing-castings.

48 represents water-pipe connecting with gage stand-pipe.

Through a pipe 40, connected with the dry-steam chamber or dome, steammay be conducted to the steam-gage 50, and by means of a water-tube 51,connected with the pipe 48, water may be conducted to the water-gage 52,these parts being of the usual construction.

Numerous changes may be made in the boiler with regard to details hereinexplained without departing from the spirit of our invention. Forinstance, other means maybe employed for heading and connecting thewater-tubes. Said tubes may be varied in arrangement and number, as mayalso the separating and superheating chamber and coil, and we wouldtherefore have it understood that we do not confine ourselves to themechanical details herein set forth and shown, but hold that we may varythe construction in any manner and to any extent within the skill ofpersons conversant with the construction and operation of boilers.

In Figs. 5 and 6 we have shown a preferred manner for securing theheader-plates 39 and 49 in position in the water-headers. In Fig. 5 therear header 37 is provided with an annular opening 50 surrounded by asimilar recess 51*, in which is mounted a packingring 52", of suitablematerial. Upon this is seated the plate 49, having an annular shoulderedrecess 53.

At the inner center of the plate there is formed a screw-threaded socket5 in which terminates a screw-threaded rod 00. The opposite end of therod 55 projects through an opening 56, formed in the oppositeheader-plate 39 at the front of the waterheader 36, which opening isreamed and provlded with an exterior annular recess 57, in wh ch isseated a packing-ring 58 and a superimposed lead or other compositiongasket 59, the two rings being bound in position by the nut 60, mountedupon the end of the rod.

55, said nut having superficial threads or ribs to enter the gasket-ring59. By this arrangement it is impossible to blow the plates or packingsfrom the water-headers.

Having described our invent-ion and its operation, what we claim is- 1.In a steam-boiler, the combination, with a feed-water coil arrangedwithin the fire-box, ot' a mud-drum connected therewith and a series ofwater-tubes connected with the muddrum, substantially as specified.

2. In asteam-boiler, the combination, with a feed-water coil arrangedwithin the fire-box, of a mud-drum connected therewith, a series ofWater-tubes connected with the mud-drum,

and a separating-chamber mounted above and connected with thewater-tubes and with the mud-drum, substantially as specified.

3. In a steam-boiler, the combination, with a mud-drum and a supply-pipeconnected therewith, of a series of Water-tubes connected to said drumand to superimposed separating and dry-steam chambers, and a return-pipeconnecting the separating-chamber and drum,

and a superheating-coil in the fire-box connected with thedry-steamchamber, substantially as specified.

4. In a steam-boiler, the combination, with a series of water-tubes, ofa feed-water-heating coil mounted at one side thereof, the tubes andcoil connected with a mud-drum, a separating-chamber arranged above thetubes and also connected with the mud-drum, and a drysteam chamberconnected with the separatin gchamber and connected with asuper-heatingcoil arranged at that side of the water-tubes oppositethefeed-water coil, substantially as specified.

5. In a steam-boiler, a system of watertubes arranged in the path of theproducts of combustion, in combination with oppositely-locatedwater-headers, opposite separating-chambers connected with the headersand separated by a vertical partition, and a superimposed dry-steamchamber, also connected with the headers and communicating with theseparating-chambers, substantially as specified.

6. In a steam-boiler, a system of Watert-ubes, opposite water-headersconnected therewith and provided with opposite separating-chambers, anda communicating steamchamber, in combination with a mud-drum connectedwith one of the headers and with the water-tubes, substantially asspecified.

7. In a steam-boiler, a system of watertubes centrally located andconnected with a muddrum, and a feed-water-heating coil arranged at oneside of said system and connected with said drum, in combination withopposite superimposed water-headers, one of which is connected with thetubes and one of which is connected with the mud-drum, and provided witha separating-chamber and a superimposed dry-steam chamber, substantiallyas specified.

8. In a steam-boiler, a system of Watertubes, in combination withopposite Waterheaders connected therewith and provided with connectingseparating-chambers, and having a central partition arranged between thechambers and a dry-steam chamber arranged above the separating-chambersand connected therewith through the medium of the water-headers,substantially as specified.

9. The casting 11, having the flanges 13, 12, and 15, in combinationwith the grate 14, mounted 011 the flange 13, and the fire-box lining16, bolted to the flange 15, substantially as specified.

1.0. The combination, with the pipes 18 and 19, arranged over thefire-box, with the vertical feed-water-heating coil 21 connectedtherewith and situated above the same, substantially as specified.

11. The shell 1, having the openings 4 and the inclined shelf 9, incombination with the plate 6, having the handle 7, notched as at 8,substantially as and for the purpose specified.

12. The water-supply pipes-18, having the flanges 33, in combinationwith the watertubes 29 and the binding-rods 34, bolted to the flangesand bent to embrace the upper of the series of tubes, substantially asspecified.

13. The combination, with the chambers 38 i and their connecting-headers36 and 37, having openings 50, provided with a surrounding recess and alead or other composition gasket seated therein, of the heads 39 and 49,the latter having the recess 53 and socket 54 and the rod 55, and theformer having the screw-threaded opening 56 and recess 57, the rings 59and 5S, and the binding-nut 60, substantially as specified.

In testimony whereof we affix our signatures in presence of twowitnesses.

NELSON s. BOWDISH. EDWARD R. BOWDISH.

\Yitnesses:

L. B. FITCH, G. O. DURSTON.

IIO

